package com.atguigu.lease.web.admin.custom.interceptor;

import com.atguigu.lease.common.context.LoginUser;
import com.atguigu.lease.common.context.LoginUserContext;
import com.atguigu.lease.common.exception.LeaseException;
import com.atguigu.lease.common.result.ResultCodeEnum;
import com.atguigu.lease.common.utils.JwtUtil;
import com.atguigu.lease.model.entity.SystemUser;
import io.jsonwebtoken.Claims;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import org.springframework.stereotype.Component;
import org.springframework.util.StringUtils;
import org.springframework.web.servlet.HandlerInterceptor;

@Component
public class AuthenticationInterceptor implements HandlerInterceptor {
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)throws Exception {

        String token = request.getHeader("access_token");

        if(!StringUtils.hasLength(token)){
            throw new LeaseException(ResultCodeEnum.ADMIN_LOGIN_AUTH);
        }else{
            //判断token是否合法，如果合法，从负载中取出uid
            Claims claims = JwtUtil.parseToken(token);
            Long userId = claims.get("userId", Long.class);
            String username = claims.get("username", String.class);
            LoginUser loginUser = new LoginUser(userId, username);
            //向ThreadLocal中保存用户信息
            LoginUserContext.setLoginUser(loginUser);
        }

        return true;
    }
}
